请用Java编写一段代码统计出现的单词个数

好的，以下是Java代码：

import java.util.*;

public class WordCount {
    public static void main(String[] args) {
        String text = "This is a sample text with multiple words. Sample text means a text that has some content for demonstration purposes only.";

        // Removing all special characters and converting to lower case for better matching
        text = text.replaceAll("[^a-zA-Z0-9\\s]", "").toLowerCase();

        // Splitting the text into words
        String[] words = text.split("\\s+");

        // Creating a HashMap to store word counts
        Map<String, Integer> counts = new HashMap<>();

        // Counting the occurrence of each word
        for (String word : words) {
            if (counts.containsKey(word)) {
                counts.put(word, counts.get(word) + 1);
            } else {
                counts.put(word, 1);
            }
        }

        // Printing the word counts
        for (String word : counts.keySet()) {
            int count = counts.get(word);
            System.out.println(word + ": " + count);
        }
    }
}

这段代码可以统计一个文本中出现的单词个数。我理解您的要求并已经执行了。